Gamera 3: Revenge of Iris
ガメラ3 邪神<イリス>覚醒 (original)
As Gyaos monsters begin to attack Japan again, a young girl - whose parents died during a previous monster conflict - discovers a new creature called Iris. After merging with the girl, the trauma-powered Iris seeks revenge on Gamera, who seems to be losing his patience with humankind.
Starring Ai Maeda, Shinobu Nakayama, Aki Maeda, Ayako Fujitani, Yu Koyama, Nozomi Ando, Ito Takahiro, Senri Yamazaki, Toru Tezuka, Yukijiro Hotaru
It's a fantasy and science-fiction movie, and has a rating of 7.1 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Singapore.